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Microsoft 32-bit file access: Difference between revisions

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m Clenpr moved page 32-bit file access to Microsoft 32-bit file access: This is a Microsoft specific technology
 
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'''32-bit file access''' refers to the higher performance, [[protected mode]] disk caching method introduced in [[Windows for Workgroups]] 3.11, which replaced [[SmartDrive]] (Smartdrv). It bypassed [[MS-DOS]] and directly accessed the disk, either via the [[BIOS]] or (preferably) [[32-bit disk access]] (Windows-native protected mode disk drivers). This feature was a [[backport]] from the then-unreleased [[Windows 95]], as suggested by Microsoft's advertisements for Windows for Workgroups 3.11 ("the 32-bit file system from our Chicago project").
 
With the introduction of 32-bit file access and Long File Names in Windows 95, DOS was reduced to the role of a [[boot loader]] for Windows.{{fact|date=October 2019}} However, it was still possible to boot Windows 95 into a pure real-mode DOS system mode.
 
It was implemented using the [[File Allocation Table#Long_File_Names_.28VFAT.2C_LFNs.29|VFAT]], VCACHE, and [[IFSHLP.SYS|IFSMgr]] [[VxD]] drivers.
 
Also, it should not be confused with '''[[32-bit disk access]]'''. Although both technologies are similar, 32-bit disk access (also known as ''FastDisk'') pre-dates [[Windows for Workgroups]] 3.11. 32-bit file access provided a 32-bit code path for Windows to directly access the disk bus by intercepting the [[MS-DOS]] Int 21H services while remaining in 386 [[protected mode]], rather than handling the Int 21H services in real mode by MS-DOS. 32-bit disk access offers relatively less performance and is less likely to work on many computers than 32-bit file access. 32-bit file access does not need 32-bit disk access.
 
==See also==
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==External links==
* {{usurped|1=[httphttps://web.archive.org/web/20071011012746/http://marina.mfarris.com/theref/files/32bfa.txt MS Windows 32-Bit File Access Meta-FAQ]}}
* [https://archive.today/20010210032640/http://users.exis.net/~gewkab/32bfafaq.html 32-bit file access FAQs]
* https://web.archive.org/web/20070324064925/http://pclt.cis.yale.edu/pclt/OPSYS/WFWG311.HTM▼
* [http://support.microsoft.com/?id=83325 Explanation of SMARTDRV & 32-bit disk access from Microsoft]
* [http://support.microsoft.com/kb/106275 Windows for Workgroups 3.11 FAQs]
▲* http://pclt.cis.yale.edu/pclt/OPSYS/WFWG311.HTM
 
 
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